Fitting for sheet metal



March 13, 1928.

1,662,068 J. IRONSIDE FITTING FOR SHEET METAL Filed March 1925 an we nfoz. dame; #000106 Patented Mar. 13,1928.

UNITED STATES PATENT OFFICE.

JAMES IRONSIIOE, OI DETROIT, MICHIGAN, ASSIGNOR TO CLAYTON AND LAMBERT I MANUFACTURING COMPANY, OI DETROIT,QMICHIGAN, A CORPORATION OF MICHI- GAN.

rr'r'rme roe. sneer METAL.

Application filed March 2, 1925. Serial No. 12,753.

The invention relates to fittings and refer-s more particularly to fittings for fire pots, torch tanks, and the like for plumbers use. The'fitting is not limited to plumbers fire pots, however, and may be used wherever a fitting of the character described may be found useful.

One of the objects of the invention 1s to provide an improved method of attaching fittings to sheet metal, such as fire pots. A further feature of the invention resides in the use of I a solder composition applied within the fitting whereby no solder is used on the outside of the fitting. A'further feature resides in providing a fitting adapted to house a soldering composition whereby upon application of heat the soldering compound will flow to form a tight joint ut will not run out of the fittin With these and ofiier objects in view, the invention resides in the novel features of construction and combinations and arran ements of parts as more fully hereinafter escribed and claimed.

Referring to the drawings:

Figure 1 is a fire pot tank with a portion thereof broken away showing a fitting embodying my invention applied thereto.

Figure 2 is a similar view of a torch tank. Figure 3 is a fragmentary 'view in elevation of one of the figures illustrated in Figure 2, and Figure 4 is a section of a fitting. In the drawings reference character A 35 indicates a fire pot tank or other article of sheet metal in which a fitting is to be secured. B represents a fitting or plug and may have a threaded opening 10 to insert a pipe, conduit, or other fixture. The fitting- 0 B is preferably formed with a cylindrical skirt portion 11 and an annular flange 12 forming an annular recess 13 adapted to receive a soldering composition preferably formed in an annular ring 14.

In applying the fitting an opening is formed in the sheet metal and the periph eral edge thereof is preferably bent at right angles as indicated at 15. The fitting B is then applied, the skirt 11 entering the opening, the soldering composition 14 positioned between the edge 15'and the flange 12. If preferred a washer 16 may then be pos i tioned against the sheet metal and the skirt the skirt 11. The fitting is then heated causing the solder to melt and form an airtight rigid connection between the fitting and sheet metal by reason of the annular recess 13 and the spun over portion of the skirt 11. It will be noted that a housing will be formed for the solder preventing its running at the B fitting. It will be further noted that the solder is applied entirely within' the fitting and forms a soldered joint entirely within the fitting.

In Figures 2 and .3 I have shown fitting B of the same general character as the fitting B, applied to the torch tankA'. The

fittings B are internally bored at 10 to re-* ceive the supporting arms of a handle or other fixture. (not shown). In these views the skirtportion 11 is bent or spunover directly into contact with the sheet metal, no intermediate washer bein employed. The sheet metal may be slight y depressed as shown at 17 in order to bring the spunover skirt portion in the plane of the sheet metal. F or holding the bushing while the skirt ortion is being spun the fitting may be provi ed with a polygonal face 18 engageable b any suitable holding means. Wit reference to Figure 2 it will be note that the fittings 13' .form a closure for the torch tank whereby the handle (not shown) may be removed for repair or otherwise, while the tank is under pressure without permitting escape of the contents of the tank.

While it is believed that from" the for-e going description, the nature and advantage of my invention will be readily understood, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the scope of the claims.

What I claim as my invention is z 1. In a tank having a. laterally flanged aperture, a handle attaching means comprising a plug for engaging a handle, said plug having a skirt and flange portion forming an annular groove concentric with the axis of the plug, a charge of solder positioned in the end of said groove and said groove being adapted to receive said lateral flange,

said skirt portion of the plug being adapted to be spun over a inst the surface of said tank a jacent sai aperture.

2. In a tank having a laterally flanged aperture, a handle attaching means com rising a plug for engaging a handle, sai plug having a skirt and ange portion forming an annular groove concentric with the axis of the plug, a charge of solder positioned in the end of said groove and said roove being adapted to receive said lateral ange, said skirt portion of the plug being turned over to clamp the wall of the tank directly between the flange and skirt of the plug.

3. In a tank having a laterally flanged aperture, an internally threaded plug member,

said plug having an annular skirt and flange portion forming therebetween an annular groove extending concentric with the axis of the plug, a ring of solder positioned in 20 the closed end of said groove, said groove bein adapted to receive said lateral flange of t e tank into contacting position. with the ring of solder, and said skirt portion of the lug bein spun over to clamp the wall 25 of t e tank etween the flange and skirt portions of the plug, whereby to confine the solder in the concentric groove formed by the skirt and flange of the lug. 4

In testimony whereof I a my signature.

' JAMES IRONSIDE. 

